Effects of different dopants and synthesizing temperatures on the microstructures and photoluminescence properties of Sr1.4Ba0.6SiO4-based phosphors

Cheng, Yung-Mao; Wu, Sung‐Mao; Liu, Jing; Ho, Yun-I; Yang, Cheng–Fu; Shih, Hong-Yu

doi:10.1007/s00542-018-3797-2

Cited by 5 publications

(4 citation statements)

References 21 publications

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“…4Ba 0.6 SiO 4 was used as host material and Nd 2 O 3 , Eu 2 O 3 , or Sm 2 O 3 were used as activators, the synthesized phosphors exhibited a dark blue or a UV luminescence (Nd 2 O 3 ), a reddish-orange or red light (Eu 2 O 3 ), or a baby blue to peach-orange light (Sm 2 O 3 ), respectively. 4 M 2 MgSi 2 O 7 -based (M = Ba, Sr, Ca) phosphors have also attracted many people interested due to their high stabilization and special structural feature, and they have potential applications in the WLEDs. In the past, the crystalline phase, the photoluminescence properties, and the mechanisms for long-lasting phosphorescence of different ion-doped M 2 MgSi 2 O 7 had been investigated.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Synthesis Temperature on the Crystalline Structures and Photoluminescence Properties of the Green-light Ca_1.975Eu_0.025MgSi₂O₇ Phosphors

Liu

Wang

Lin³

et al. 2020

Crystal Growth & Design

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First of all, the Ca1.975Eu0.025MgSi2O7 powder was synthesized at the temperature range of 1150–1350 °C through the solid-state reaction method. The reduction atmosphere (5% H2 + 95% N2) was infused during the synthesis process, and it was removed as the temperature went to 800 °C. Synthesized at 1150 °C, the Ca2MgSi2O7, CaSiO3, and CaMgSiO4 phases coexisted, and the photoluminescence (PL) spectrum had only one broad emission band with centered wavelength of 475 nm (blue light), which was dominated by Eu2+-doped CaSiO3 and CaMgSiO4 phases. As Ca1.975Eu0.025MgSi2O7 powder was synthesized at 1350 °C, only the Ca2MgSi2O7 phase was observed, and Eu2+-doped Ca2MgSi2O7 phase would dominate the only one broad emission band with centered wavelength 529 nm (green light). Synthesized at 1200–1300 °C, the diffraction intensities of CaSiO3 and CaMgSiO4 phases decreased, and that of Ca2MgSi2O7 phase increased; their PL spectra could be broken into a combination of the PL spectra of 1150 °C- and 1350 °C-synthesized Ca1.975Eu0.025MgSi2O7 phosphors. The Ca1.975Eu0.025MgSi2O7 powder was also heated to 1350 °C, and the reduction atmosphere was removed as the temperature went to 1300–800 °C; only one broad emission band with centered wavelength 529 nm was found in these synthesized phosphors. When the reduction atmosphere removing temperature rose, because the concentration of Eu2+ ions decreased, both the emission intensity and decay time decreased.

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Section: Introductionmentioning

confidence: 99%

“…For example, as Sr 1. 4Ba 0.6 SiO 4 was used as host material and Nd 2 O 3 , Eu 2 O 3 , or Sm 2 O 3 were used as activators, the synthesized phosphors exhibited a dark blue or a UV luminescence (Nd 2 O 3 ), a reddish-orange or red light (Eu 2 O 3 ), or a baby blue to peach-orange light (Sm 2 O 3 ), respectively …”

Section: Introductionmentioning

confidence: 99%

Effect of Synthesis Temperature on the Crystalline Structures and Photoluminescence Properties of the Green-light Ca_1.975Eu_0.025MgSi₂O₇ Phosphors

Liu

Wang

Lin³

et al. 2020

Crystal Growth & Design

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“…[12] Anyway, we used different dopants and synthesis temperatures by an SSR method to investigate the crystallization and luminescent properties of Sr 1.4 Ba 0.6 SiO 4 -based phosphors, in which the Sr 1.4 Ba 0.6 SiO 4 :Nd, Sr 1.4 Ba 0.6 SiO 4 :Eu, and Sr 1.4 Ba 0.6 SiO 4 :Sm phosphors had been successfully produced. [13] In the past, Chen et al synthesized BaZrO 3 :Eu 0.025 powder through the SSR method with two different heating processes and they found that the different synthesized processes would strongly affect the photoluminescence properties of perovskite Eu-doped BaZrO 3 phosphors. [14] Cheng et al synthesized Sr 1.4 Ba 0.6 SiO 4 -based phosphors with different earth metal oxides by a SSR method and they found that different dopants and different synthesis temperatures would strongly affect the microstructures and photoluminescence properties of these Sr 1.4 Ba 0.6 SiO 4 -based phosphors.…”

mentioning

confidence: 99%

“…[14] Cheng et al synthesized Sr 1.4 Ba 0.6 SiO 4 -based phosphors with different earth metal oxides by a SSR method and they found that different dopants and different synthesis temperatures would strongly affect the microstructures and photoluminescence properties of these Sr 1.4 Ba 0.6 SiO 4 -based phosphors. [13] Yang et al [12] and Somani et al [15] found that the different concentra- xEu 3+ phosphors with x = 0.01-0.03, and the concentration quenching effect happened in the two researches. For that, we prepared Sr 2-x SiO 4 :xEu 3+ phosphors with x = 0.01, 0.02, 0.035, and 0.05 to investigate the concentration quenching effect.…”

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Effects of synthesis methods and different concentrations of Eu³⁺ ions on the emission properties of Sr₂SiO₄ phosphors

Chen

Yang

et al. 2021

Luminescence

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Sr 2-x SiO 4 -xEu (x = 0.01, 0.02, 0.035, and 0.05) phosphors were synthesized at 1000-1,300 C for 2 h in two different processes, the solid-state reaction (SSR) method and a two-step (TS) method, and these results revealed three important findings. The secondary Sr 3 SiO 5 phase was observed in 1,300 C-TS-synthesized Sr 2-x SiO 4 -xEu powder, but no raw materials or secondary phases were observed in the SSR-prepared Sr 2-x SiO 4 -xEu powders. The concentration quenching effect of Eu 3+ ions was really observed in TS-prepared Sr 2-x SiO 4 -xEu phosphors, which was not observed in SSR-prepared Sr 2-x SiO 4 -xEu phosphors. High emission intensity of charge transition state (CT) band was observed in the photoluminescence excitation spectra, for that the 265 and 393 nm were used as the excitation wavelengths of Sr 2-x SiO 4 -xEu phosphors. Sr 2-x SiO 4 -xEu phosphors under different synthesis processes and excitation wavelengths would have different main emission peaks in the photoluminescence emission spectra. In this study, we also well discussed and explored the relationships of photoluminescence properties with the dipole transitions (electric or magnetic) of Eu 3+ ions and the different coordination structures of Sr +2 ions. K E Y W O R D S charge transition state, concentration quenching effect, different synthesis processes, Sr 2-x SiO 4 -xEu phosphors 1 | INTRODUCTION Inorganic luminescent materials have been investigated as practical applications in many display devices, for example, flat panel screens and field emission displays. Recently, considerable efforts have been devoted to investigate materials with different emission properties,which can be used for WLEDs and optical storage devices. [1,2] As being compared with traditional incandescent and fluorescent lamps, WLEDs have the advantages of high brightness, dependability, long life-time, low power consumption, lack of toxic mercury, and environmental friendliness. [3] For that, WLEDs are promising devices for solid-state lighting and liquid-crystal display backlights because of their excellent properties. More researchers pay attention to developing phosphors and applying them to fabricate WLEDs with different emission methods. Accordingly, the investigations of highperformance phosphors with the properties of blue-light excitability, high quantum efficiency, and small thermal quenching are vital.Many methods are currently used to produce WLEDs, including combining blue LEDs with a yellow phosphor material, combining blue LEDs with the green and red phosphors, using UV-LEDs combined

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Effects of synthesis temperature on the microstructures and photoluminescent properties of Eu2O3-doped Sr2−xBaxSiO4 phosphors

Cheng

et al. 2019

Microsyst Technol

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Effects of different dopants and synthesizing temperatures on the microstructures and photoluminescence properties of Sr1.4Ba0.6SiO4-based phosphors

Cited by 5 publications

References 21 publications

Effect of Synthesis Temperature on the Crystalline Structures and Photoluminescence Properties of the Green-light Ca_1.975Eu_0.025MgSi₂O₇ Phosphors

Effect of Synthesis Temperature on the Crystalline Structures and Photoluminescence Properties of the Green-light Ca_1.975Eu_0.025MgSi₂O₇ Phosphors

Effects of synthesis methods and different concentrations of Eu³⁺ ions on the emission properties of Sr₂SiO₄ phosphors

Effects of synthesis temperature on the microstructures and photoluminescent properties of Eu2O3-doped Sr2−xBaxSiO4 phosphors

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Effects of different dopants and synthesizing temperatures on the microstructures and photoluminescence properties of Sr1.4Ba0.6SiO4-based phosphors

Cited by 5 publications

References 21 publications

Effect of Synthesis Temperature on the Crystalline Structures and Photoluminescence Properties of the Green-light Ca1.975Eu0.025MgSi2O7 Phosphors

Effect of Synthesis Temperature on the Crystalline Structures and Photoluminescence Properties of the Green-light Ca1.975Eu0.025MgSi2O7 Phosphors

Effects of synthesis methods and different concentrations of Eu3+ ions on the emission properties of Sr2SiO4 phosphors

Effects of synthesis temperature on the microstructures and photoluminescent properties of Eu2O3-doped Sr2−xBaxSiO4 phosphors

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Effect of Synthesis Temperature on the Crystalline Structures and Photoluminescence Properties of the Green-light Ca_1.975Eu_0.025MgSi₂O₇ Phosphors

Effect of Synthesis Temperature on the Crystalline Structures and Photoluminescence Properties of the Green-light Ca_1.975Eu_0.025MgSi₂O₇ Phosphors

Effects of synthesis methods and different concentrations of Eu³⁺ ions on the emission properties of Sr₂SiO₄ phosphors